Rotary pump and motor



A. w. WEE DEN ROTARY PUlIP AND uowoiz Filed June 21, 1928 Fig.2.

/ /V 'A /W Patented July], 1930 Application filed June 21,

This invention relates to a-rotary-pump I or motor and particularly to a rotary pump of the type comprising a stationary casing or housing and two co-operati'ng rotary a pumping elements therein, one of which is in the nature of an annular ring having internal gear teeth and the other of which is in the nature of agear which meshes with the internal gear teeth and is mountedon a shaft, which will be the driving shaft inthe rection while thus avoiding the friction loss case ofa pump or the driven shaft in the case of a motor. i

One of the objects of the'invention is to provide an improved rotary pump of this type in which the fluid being pumped will have a-continuous movementin the same dipassing through the pump which occurs where the fluid has to make abrupt changes of direction.

Other objects of the invention are to imrove enerally fluid umps of this ty e 511 as will be more fiilly hereinafter slit forth. I e

In order to give an understanding of the invention I have illustrated in the drawings a selected embodiment thereof which will is b = which intermesh the member pump embodying nto on one-side and an outlet therefrom on the other side.

The pumping elements comprise the cylindrical ring member 5 which fits within the chamber'2 and is provided with interior gear teeth 6 and a co-operating rotary memer 7 having gear teeth 8 on its periphery with the gear teeth 6 of 5. The rotary member? is fast on a shaft 9 that is journalled in bearings 10 formed in the casing 1. Said shaft constitutes the driving shaft if the device is v Romany rugur AND moron and 7.

the blades onwoL -AsToN, mssnenusm'rs', .A CORPORATION OF IMASSA- 1928. Serial No. 287,328.

operating as a pump and the driven P if it s operating-as a motor. is situated eceentrically of t e cylindrical I. This shaft 9 chamber 2. The casing l isalso formed with a crescent-shaped partition member 11 which is situated between the rotary members v5 The convex face 12 of this crescent-shaped toothed partition 11 is spaced from the inner face 13 face of the ring 5 and the concave- "of said partition is spaced from the periphcry of the rotary member 7 There will thus be apassageway or space 14 between the part1t1on 11 and the rotary ring member 5 and another passageway or-space .15 betweensaid partition and the gear member 7. These two passageways pointed ends 'ofthe partition as shown at 16.. p

The gear teeth 6 and. 8 form the driving 7 and5. The'gear 7 is. 'rovided with-aplurality of long teeth or lades 17' which project considerably beyond the gear teeth 8, and the ring member.5 isprovided with pockets 18 which are spaced so as to receive the blades 17 during the rotationof the rotary members. These blades 17 are ofa proper length to engage the concave face 13 of the partition 11. i

he ring member 5 is alsdprovided with a plurality of inwardly-directed blades 19 which are of a length to engage the convex face 12 of the partition member 11, and the gear member 7 is formed with-pockets20 having the 19 during the tary members.

The inlet port 3 opens into the j pump chamber through one side thereof, said port communicating-with a passage 21 formed in a boss 22 onthe side of the casing 1, and said passage 21 communicating with an in.- let pipe 23. This inlet opening 3 is located at the left side of the vertical diameter of the rotary members lookingat Fig. 1.

The outlet on the opposite side of the casing and also on the opposite side of the vertical diameter from the inlet port3, said port 4: communimerge together at the.

proper size and spacing to receive rotation of the roor discharge port 4 is-situated connection between the two rotary'members diameter to fi t a the shaft 9, the rotationof the'sha eating with a passage 24 in a boss formed on the side wall of the casing, said passage 24'havin'g communication with a discharge pipe 26..

Assuming that'the device is operating as um in which case power is'ap lied to 9 will rotate the gear '7 and the latter will cause the ring member 5 to be rotated within the chamber 2. This ring member 5 is of proper the cylindri cal casing 2 so' that the walls of the casing form a guide 1111a port a commumcationfor said ring member in its rotatlon.

The water which is supplied through the will fill the space between the rotary members 5 and 7 at the left"of the center and as the members continue their rotation the spaces between the blades 1.9 of the ring member 5 and theexterior face 12 of'the crescent-shaped partition 11 will be filled with water, and the water which is thus trapped in each of these spaces will be carried around by the rotation of he. ring member 5 to the right handside of looking at Fig. 2.

Similarly, the rotation'of the gear member 7 produces pockets or spaces between the blades 17 and the concave face 13 of the crescent-shaped partition andthe water thus trapped in these. artitions will be carried from the left to t e right hand side of the casing.

During 5 these spaceS e casing the rotation of the members 7 and orpockets are brought into withjth'e outlet port 4 and as the gear teeth fiand 8' are inclose mesh at 'the bottom there is no' chance for the water without departing to pass between the two rotary members at this point and consequently the water will be delivered through the outlet port 4. If the contacting parts of the pum have a" close fit the water'will be delivered under a considerable pressure.

As illustrated .in the drawings the water; entersthe pump from the right Fig. 1 as indicated by the arrows and it passes through the pipe 23 and passageway 21 and through the inlet port 3 and thence continues in the same general direction but in the form of a loop around through the passages 14 and 15 and is then delivered through the port 4 and continues its movement still in the same direction through the outlet pipe 26. There is, therefore, -no abrupt change of direction of the water in passing through the pump and this is a decided'advantage as it reduces friction loss and prevents the eddymg of the water suchas would be produced by abrupt changes-in the direction of the flow.

The casing 1 may be made in various wa sfrom the invention. s herein illustrated it is formed with the two side plates 27, 28 between which are located a rim me ber. 29 .and also the crescenttakethe place of a single shaped partition 11, these parts being bolted together by suitable bolts 30. Other ways, however, of producing the casing may be resorted to without in any way departing from the invention.

The blades 19 and 17 are preferably removably mounted in the rotary members 5 and 7 so that when anyblade becomes worn it can be removed and replaced by a fresh blade. Each blade is of a shape and size to gear tooth and hence there will always be a suflicient number of teeth 6 and 8 in mesh to make a' tight joint at the meshing point so as to prevent water from by-passing from the outlet to the discharge end of 6 and 8 constitute the sole driving means for transmitting motion from one rotary member to the other. The blades 17 have such a relation to the pockets 18 and the blades 19 such a relation that during the passing of one rotary-member through a pocket on another. rotary member the blade is out of contact with the walls of the 'ocket. The relation between the blades and? pockets and gear teeth 6, 8, however, is such that there is always a driving connection between the two rotary members through the gear teeth. In other words, in all relative positions of the rotary members there will always be a sufiicient number of gear teeth 6, 8 in mesh with each'other to drive one rotary member from the other. The blades thus have no power-transmitting function but are merely to co-operate with the crescent-shaped member 11 to passages 14: and 15.

The discharge port 4 is made-wider at its upper end than at its lower end, said port conforming in shape substantially to the shape of the portion of the space between to the pockets 20 any blade on form the pockets in the separate.

the pump. The gear teeth the two'rotary members adjacent the point of the teeth there will be no possibility that anywater can be trapped between the teeth as they are being brought into mesh.

I claim: 1. In' a rotary pump, the combination with a casing havlng a cylindrical chamber and a crescent-shaped" partition extending across the chamber, of a ring member rotatable in said casing and encircling the crescent-shaped partition, said ring member having internal gear teeth which are spaced from the convex face of said partition, a

second. rotary memberwithin said casing having external gear teeth meshing ,with those of the ring member, said second rotary. member being situated below the partition member and spaced from the concave face thereof, a power shaft rigid withthe second rotary member, said ring member having blades extending inwardly beyond the gear teeth and engaging the convex'face of the partition member, and the second rotary memberalso having blades projecting beyond its gear.- teeth and engaging the concave face of the partition member, each rotary member having pockets in which the blades of the other member operate, said blades and; pockets, having such relation that each blade operates freely in the corresponding pocket without engaging the wallsithereof, the gear teeth and'pockets being so related that in all relative positions of the two rotary members there will be a sufficient number of gear teeth in mesh to constitute a driving connection between said members, said casing. having an inlet port on' one side and anoutlet port on the opposite side a'nd there being two passages connecting the inlet port and the outlet fport, one passing along the. convex face 0 the crescent-shaped partition and the other along the concave face thereof.

"2. In a rotary pump, the combination with a casing having'a cylindrical chamber and a crecent-shaped. partition extending across the chamber, of a ring member rotatable in said casing and encircling the-crescent-shaped partition, said ring member hav- 1 0 mg internal gear teeth which are spaced from the convex face of saidpartitioma second rotary member within said casing having xternal gear teeth meshing with those of the ring member,-sa id second r tary memberbeing situated term the partition member and spaced from theiconcave face thereof,- a power shaft rigid-with the second A V rotary member, said ring member having 7 blades extendinginwardly beyond the gear 40 teeth and engaging the convex face of the partition member, and the second rotary member also having blades projecting be yondits gear teeth and engaging the concave face of the partition member, each rotary member havlng pockets in which the blades of the other member operate, said blades and pockets having such relation that each blade operates freely inthecorrespondi ing pocket without engaging the walls thereof, the gear teeth and pockets being so re lated that in all relative positions of the two rotary members there will be a suflicient number of gear teeth in mesh to constitute a driving connection between said members,

said casing having an inlet port-on one side with apassage leading thereto which crosses the vertical diameter'of the casing and an outlet port on the other side which also crosses the verticalv diameter of the. casing,-

whereby the fluid passing through the pump takes a loop-shape course without any sharp l changes of direction.

Intestimony whereof I have signed my name. to this specification.

ARTHUR w.- WEEDENi; 

